From b31ba1056ee4647f188b997dcb47450bfe1cb25e Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 7 Mar 2018 11:54:07 +0000
Subject: complex.c: check type

* complex.c (nucomp_s_canonicalize_internal): determine the type
  by the internal type, not by a method.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62688 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_complex.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_complex.rb b/test/ruby/test_complex.rb
index 316e3e21ff..48fb9947a3 100644
--- a/test/ruby/test_complex.rb
+++ b/test/ruby/test_complex.rb
@@ -958,4 +958,16 @@ class Complex_Test < Test::Unit::TestCase
   def test_known_bug
   end
 
+  def test_canonicalize_internal
+    obj = Class.new(Numeric) do
+      attr_accessor :real
+      alias real? real
+    end.new
+    obj.real = true
+    c = Complex.rect(obj, 1);
+    obj.real = false
+    c = c.conj
+    assert_equal(obj, c.real)
+    assert_equal(-1, c.imag)
+  end
 end
-- 
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